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CHEMISTRY FROM 2

Chapter 4: States of matter

Criteria for purity

For a substance to be pure, it usually has a sharp melting point for solids. It means it has a short range of temperature, while for liquids it has a sharp range of boiling points meaning it boils in a narrow range of temperatures

par Claude Foumtum

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CHEMISTRY FROM 2

Chapter 1: Chemical symbols, Formulae and Valencies

Definitions DERIVING CHEMICAL FORMULAE Chemical reactions and Equations Balancing chemical equations THE LAW OF CONSERVATION OF MASS ACTION OF HEAT ON A SUBSTANCE REACTION OF SUBSTANCES WITH OXYGEN RUSTING OF IRON

Chapter 2: THE ATOM

The Dalton?s atomic theory Subatomic particles and their charges Masses of subatomic particles Arrangement of electrons in atoms ASSIGNMENT

Chapter 3: The PERIODIC TABLE

Definition The works of Dimitri Mendeleev The modern periodic table Groups of the periodic table Metals and Non-metals

Chapter 4: States of matter

Definition TYPES OF MATTER Change of state Pure substances Techniques of separation Experiment to purify sea water c) CHROMATOGRAPHY Criteria for purity

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